Strange shading on lower half of screen....

So I patched a GBA FF6 with sound and color restoration (basically so the colors and sound is like the SNES version.) patches and while on the overworld in the airship there is a a sort of shading on the bottom of the screen. It's not a small area but nearly halfway up the screen. I tried using an unpatched version but to no avail... I'm playing on iPod which is the problem since on PSP and PC it works no problem...I just want to be able to play on something that is quick and easy. Anybody know how I would fix this? I'll try to get a screenshot. Sorry if I'm not allowed to talk about emulators but I was just trying to check the rules and I can't access them (?)


PS: This shading effect only happens in FFVI.